The work shaft in barrel pushes the oil seeds material forward. The material is pressed as worm diameter increases and the diameter of barrel decreases when it is pushed forward. Oils in material gets out by way of cage bars. Screw press shaft is made of stainless steel. The bars in cage are 1*178mm or 3*276mm.

We’ve all kinds of screw press, from small press to super big press, as shown in following table.